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methodologies developed to synthesize, place and route, simulate, verify,
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-/&) "4)"118 (/! ,2/+)
 Hewlett-Packard Company 1995
PA 7100LC Processor
Floating-Point
Control
Memory and
I/O Control
Instruction
General System
Connect (GSC)
Bus
DRAMs
Instruction
Memory and
I/O Interface
Level 1
Instruction
Cache
Instruction
Floating-Point
Execution
Unit
Instruction
Address
Data
Integer
Execution
Unit 1
Address
Translation
Lookaside
Buffer (TLB)
External
Cache
Interface
Integer
Execution
Unit 2
Data
Cache Control
SRAMs
Control Lines
Instruction
Execution and
Sequencing
Control
(4 Blocks)
Test
Circuits
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of Artwork
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• !+:+4:/54 5, /4:+84'2 9:':+ =.+4 :.+ )./6 )25)19 '8+ .'2:+*
:5 );9:53+89 &+ )8+':+* :.+ 9+)54* -5'2 =/:. :.+ 145=2A
• 4:+84'2 9)'4 =/:. 9/4-2+ '4* *5;(2+ )25)1 9:+6 )'6'(/2/:?
+*-+ :.': /4 953+ )'9+9 ;4*+89:'4*/4- :.+ 855: )';9+ ,58
• ;22? 9:':/) 56+8':/54 :5 9;6658: 5,,A)./6 :+9:/4,'/2;8+9 5;:9/*+ 5, 5;8 +>6+):+* 56+8':/4- 8'4-+ =5;2* (+
• "/-4':;8+ '4'2?9/9 )'6'(/2/:? ,58 :+9:/4- :.+ 54A)./6
(+4+,/)/'2 "53+:/3+9 :./9 145=2+*-+ =5;2* +4'(2+ ;9 :5
/49:8;):/54 (;,,+8
3'1+ 685'):/<+ *+9/-4 ).'4-+9 =./). =5;2* /4)8+'9+ )./6
• :A96++* )'6:;8+ 5, /4:+84'2 9:':+9 (? 9)'4 8+-/9:+89
?/+2*9 8+9;2:/4- /4 25=+8 )./6 '4* 9?9:+3 )59:9 ";). 145=2A
+*-+ /9 '295 ;9+,;2 =.+4 35</4- :.+ )./6 /4:5 ' ./-.+8A,8+A
#5 3++: 3'4;,'):;8/4- )59: -5'29 :.+ .'*
7;+4)? 8'4-+ 58 ' 4+= 685)+99 :+).4525-?
'--8+99/<+ 7;'2/:? '4* :+9: :/3+ -5'29 )536'8+* =/:. 5;8
68+</5;9 685)+9958 *+9/-49 5:. 5, :.+9+ /:+39 9/-4/,/)'4:2?
#5 3++: :.+9+ -5'29 =+ /49:8;3+4:+* 9+<+8'2 9?9:+39 95
',,+): ,/4'2 )./6 )59: :+9: 3+:.5*525-? ='9 *+<+256+*
:.': =+ )5;2* /4*+6+4*+4:2? )54:852 +'). 5, :.+ $ 9;662?
+'82? /4 :.+ *+9/-4 6.'9+ :5 ,')/2/:':+ :.+ ')./+<+3+4: 5,
<52:'-+9 '4* :.+ 56+8':/4- ,8+7;+4)? 5, :.+ 9?9:+3 &+ /4:+8A
:.+9+ -5'29 #.+ 3+:.5*525-? +4)536'99+* )./6 :+9: '4*
,')+* +'). 9+: 5, )54:8522/4- /49:8;3+4:9 :5 ' .59: )536;:+8
).'8'):+8/@':/54 4++*9 '4* 3'4;,'):;8/4- :+9: 4++*9
=./). )5;2* 9?9:+3':/)'22? <'8? :.+ 56+8':/4- 65/4: 6'8'3+A
:+89 */8+): :.+ 9?9:+3 ;4*+8 :+9: :5 8;4 ' <'8/+:? 5, 6599/(2+
#+9:/4- /9 '))5362/9.+* :.85;-. ' 3/>:;8+ 5, 6'8'22+2 '4*
:+9:9 '4* 5(9+8<+ '4* 25- :.+ 8+9;2:9 5, :.59+ :+9:9 &+
9)'4 3+:.5*9 ;9/4- '4 9+3/)54*;):58 :+9: 9?9:+3
62')+* +'). 9?9:+3 ;4*+8 :+9: /4 '4 +4</8543+4:'2 ).'3(+8
#.+ 3'058/:? 5, :+9:/4- /9 *54+ =/:. ':A96++* 6'8'22+2 6/4
:.': ='9 )'6'(2+ 5, <'8?/4- :.+ :+36+8':;8+ ,853 ° :5
:+9:9 #+9:9 =8/::+4 /4 A!" '99+3(2? )5*+ )5<+8 25-/)'2
° 4 +'). 9?9:+3 ;4*+8 :+9: =+ '295 <'8/+* 9?9:+3 6'A
,;4):/54'2/:? '4* 96++* 6':.9 '4* '8+ )54<+8:+* :.85;-. '
8'3+:+89 9;). '9 3+358? 25'*/4- '4* (;9 25'*/4-
9/3;2':/54 +>:8'):/54 685)+99 /4:5 :+9:+8 <+):589 ")'4A('9+*
(25)1 :+9:9 '8+ ;9+* ,58 )/8);/:9 9;). '9 9:'4*'8*A)+22 )54:852
4 :.+ 68+9+4)+ 5, '4 +2+):8/)'2 ,'/2;8+ '4* :.+ '668568/':+
(25)19 '4* :.+ 54A)./6 /49:8;):/54 (;,,+8 =./). '8+ /4.+8A
56+8':/4- )54*/:/549 )+8:'/4 )5*+ 9:8+'39 =/22 45: +<'2;':+
+4:2? */,,/);2: :5 :+9: ,;22? ;9/4- 6'8'22+2 6/4 :+9:9 3+'A
'9 +>6+):+* #5 +'9+ :.+ :'91 5, /952':/4- +2+):8/)'2 ,'/2;8+9
9;8+3+4:9 '8+ '295 6+8,583+* ',:+8 953+ 6'8'22+2 :+9:9
=+ )8+':+* :+9: )5*+ 96+)/,/)'22? ,58 +2+):8/)'2 <+8/,/)':/54
:.': 9:8+99+* :.+ <'8/5;9 /4:+8,')+9 '4* ,;4):/54'2 ;4/:9 5,
68/2 +=2+::A')1'8* 5;84'2
 Hewlett-Packard Company 1995
VDD
Inverter
Holder
Circuitry
Hold Up
Hold Down
VDL
Boundary
Scan Drive
Output
Driver
Input Receiver
Tristate
Enable
VDD
Inverter
Pull Up
Drive Clock
Pad
Driver
Pad Data
Pad
Pull Down
Into
Chip
Boundary
Scan Data
Scan In
Boundary
Scan
Circuitry
Scan Out
Large
Driver
FETs
Small
Holder
FETs
,/2.,),(' ',$*4$/ 1) $ '4,8(4 6$6,& &744(06 &$0 ).19 )41/ # 61 *4170' ,0 6+( ,08(46(45 ,) 6+( 2$' ,5 016 '4,8(0
61 # 14 *4170' 14 (:$/2.( ,) 6+( 2$' '4,8(4 '4,8(5 $ 10( 6+( 2$' 917.' %( '4,8(0 61 # # 9+,&+ 917.' &$75( 56$6,& &744(06 61
).19 ,08$.,'$6,0* 6+( 6(56 14 /($574(/(065 6+( 2$' ,5 '4,8(0 61 # *4170' 6+417*+ 6+( %170'$4; 5&$0 &,4&7,64; $0' 2$'
'4,8(4
61 2418,'( $'',6,10$. '()(&6 &18(4$*( !+( 2$4$..(. 6(56 5(<
37(0&( ,5 56$6(5 .10* $0' %,65 1) 5&$0 8(&6145
$4( 75(' '74,0* 5&$0 6(56,0*
!1 /((6 174 6(56 37$.,6; $0' &156 *1$.5 9( ,/2.(/(06('
691 0(9 &+,2<6(56 6(&+0,37(5 6+$6 +$' 016 %((0 75(' 10
24(8,175 < ,/2.(/(06$6,105 6(56,0* $0' 5$/2.(<
10<6+(<).; 6(56,0*
6(56,0* ,5 $ 6(56 /(6+1'1.1*; ,0 9+,&+ 6+( 24(5(0&( 1)
'()(&65 ,5 '(6(&6(' %; /($574,0* '& &744(06 9+(0 6+( &+,2 ,5
+$.6(' 10'()(&6,8( )7.. *$6(5 '4$9 56$6,& &744(06
/$'( 72 1) .($-$*( &744(065 6+$6 $4( ,0 6+( 0 4$0*( 19<
(8(4 '()(&6,8( *$6(5 &$0 '4$9 &744(065 /$0; 14'(45 1) /$*<
0,67'( +,*+(4 ) $ &744(06 /($574(/(06 ,5 /$'( 10 6+(
219(4 5722.; '74,0* $ 56$6,& 56$6( $ *11' &+,2 9,.. '4$9
8(4; .,66.( &744(06 $0' $ '()(&6,8( &+,2 9,.. '4$9 /7&+ /14(
+$5 +,*+ 1%5(48$%,.,6; $0' '(6(&65 /$0; ',))(4(06 6;2(5
1) '()(&65 6 9$5 '(&,'(' ($4.; ,0 6+( '(5,*0 1) 6+( " 6+$6
6(56 &$2$%,.,6; 917.' %( $ '(5,4$%.( 6(56 )($674( 6(56 &$2$%,.,6; 9$5 $.51 '(5,4$%.( %(&$75( ,6 57%56$06,$..;
4('7&(5 56$6,& 219(4 &1057/26,10
Design Rules. !1 5722146 6(56,0* /156 1) 6+( &,4&7,65
.(8(4$*(' )41/ 2$56 < ,/2.(/(06$6,105 6+$6 '4(9 '&
&744(06 9(4( (.,/,0$6(' 14 ($&+ &$5( ,0 9+,&+ 75,0* $ &,4<
&7,6 6+$6 '4(9 56$6,& &744(06 9$5 6+( 10.; 4($510$%.( '(5,*0
51.76,10 6+( &,4&7,64; 9$5 4('(5,*0(' 61 %( ',5$%.(' 9,6+ $
6(56 5,*0$. '74,0* /($574(/(065 156 %.1&-5 &106$,0<
,0* 25(7'1< &,4&7,64; 9(4( 4('(5,*0(' 75,0* 56$6,&
&,4&7,64; ;0$/,& &,4&7,65 9(4( /1',),(' 61 (.,/,0$6(
56$6,& &744(06 $0' 61 4(6$,0 56$6( 9+,.( 6+( &+,2 ,5 +$.6(' 1
! *$6( ,5 $..19(' 61 %( ,0 $ 5,67$6,10 9+(4( ,6 &17.' ).1$6
,) 6+( &.1&-5 $4( +$.6(' %(&$75( 6+,5 &17.' 2155,%.; &$75( 6+(
! 61 6740 10 06(40$. 27..725 10 ,0276 2,05 $4( ',5$%.('
'74,0* /($574(/(065 ,0&.7',0* 6+( 6(56
2,05 1 '4,8( ),*+65 $4( $..19(' ,0 $ 56$6,& 56$6( .. 01'(5
/$-( $ )7.. 64$05,6,10 61 $ 5722.; 4$,. 9+,&+ ,5 $&&1/2.,5+('
 Hewlett-Packard Company 1995
6+417*+ 6+( 75( 1) 4(5614$6,8( 56$6,& )(('%$&- 9+(0 )7..
64$05)(4 *$6(5 $4( 016 75(' ,0 .$6&+(5 $0' /7.6,2.(:<
(45 0; %75 6+$6 &17.' %( &1/2.(6(.; 64,56$6(' ,0 $0; 56$6(
75(5 $ %75 +1.'(4 &,4&7,6 61 /$,06$,0 2412(4 .(8(.5
Special Considerations. !+( ).1$6,0*<21,06 " 9+,&+ 9$5
.(8(4$*(' )41/ 6+( 241&(5514 '4(9 56$6,& &744(06
$0' 4('(5,*0,0* ,6 9$5 016 )($5,%.( *,8(0 174 5&+('7.( &10<
564$,065 19(8(4 ,6 ,5 2155,%.( 61 (.,/,0$6( 6+( 56$6,& &744(06
'74,0* /($574(/(065 ,) 6+( " ,5 016 (8$.7$6,0* '74<
,0* 6+( /($574(/(06 ,0&( 6(56,0* 9$5 016 *1,0* 61 %(
75(' 61 6(56 6+( " 6+,5 9$5 $&&(26$%.( 6(56,0* '74<
,0* 2$4$..(. 8(&6145 ,5 56,.. 2155,%.( %76 ,) $ ).1$6,0*<21,06
12(4$6,10 1&&745 6+$6 75(5 6+( " 6+( " .15(5 ,65 ,06(40$.
56$6( ,) 6(56 /1'( ,5 (0$%.(' '74,0* 6+( 6(56
016+(4 $4($ 1) &105,'(4$6,10 )14 ,081.8(' 6+( %,6
5.,&(5 !+( " 75(5 691 219(4 5722.,(5 # $0' #
9+,&+ $4( 01/,0$..; $6 # $0' # 4(52(&6,8(.; # 572<
2.,(5 $.. 1) 6+( ,06(40$. &+,2 .1*,& 9+,.( # ,5 6+( 5722.;
)14 6+( 176276 '4,8(4 27..72 !5 !+( ,0276 4(&(,8(45 10 6+(
" 014/$..; '4$9 56$6,& &744(06 9+(0 $0 176276 '4,8(4 ,5
10 6+$6 '4,8(5 61 # 0 $'',6,10 $ &,4&7,6 61 +1.' 6+( &74<
4(06 8$.7( 10 6+( 2$' &$0 '4$9 56$6,& &744(06 ,) 6+( 2$' ,5
016 '4,8(0 61 # 14 *4170' !+(4()14( 9+(0 /($<
574(/(065 $4( 6$-(0 6+( 176276 '4,8(45 $4( '4,8(0 61 *4170'
6+417*+ 6+( 75( 1) 6+( %170'$4; 5&$0 &,4&7,64; 61 (.,/,0$6(
56$6,& &744(06 ).19 ,0 6+( 4(&(,8(4 $0' 2$' +1.'(4 &,4&7,65
5(( ,* !+( 2$4$..(. 6(56(4 '4,8(5 ,0276<10.; 2,05 61 #
14 *4170' $5 $224124,$6( ,0&.7',0* 6+( ,06(4)$&(
2,05 !+( $0$.1* ,02765 1) 6+( &.1&- %7))(45 $4( $.51 '4,8(0
61 $224124,$6( 8$.7(5 61 24(8(06 56$6,& &744(06
!+(5( 47.(5 9(4( ($5; 61 $'+(4( 61 $0' )1..19(' 174 4$6,1<
0$.( 61 ,0&4($5( 6(56 &$2$%,.,6; 9,6+ .,66.( '(5,*0 ,/2$&6 &1/2.,$0&( 9$5 8(4,),(' %; 4700,0* )70&6,10$. 5,/7.$6,10
&$5(5 6+417*+ $0 24124,(614; !<.(8(. 59,6&+ 5,/7.$614
9+,&+ $.51 +$5 6+( $%,.,6; 61 &+(&- )14 56$6,& &744(06
24,. (9.(66<$&-$4' 1740$.
HP 82000 Test Fixture
Test Fixture VDD Ring
R
R
Chip VDD
Bypass
Capacitors
R
Microamps
HP 82000 Test System
Bypass
Capacitors
Chip
Under
Test
R
Several Amps
R
Parametric Measurement
Unit (Supplies and Measures
Low Static Current)
Device Power Supply
(Supplies High Dynamic
Current)
R = Relay Controlled by Tester
.'#463'.'/5 4'561
7+0-#5+0/4 '%#64' 0( %#3'(6- #55'/5+0/ 50 5*' &'4+)/ )6+&'<
-+/'4 0/-: 4+9 7+0-#5+0/4 8'3' &+4%07'3'& 8*'/ 5*'
4+.6-#5+0/4 8'3' 36/ #-- 0( 8*+%* 8'3' '#4+-: 3'40-7'&
.'#463'.'/54 #3' 5#,'/ 64+/) # 1#3#.'53+% .'#463'<
.'/5 6/+5 0/ 5*' 5'45'3 4'' +) "*'/ # .'#<
463'.'/5 +4 50 $' 5#,'/ # 7'%503 4'26'/%' +4 36/ 50 1-#%'
5*' &'7+%' 6/&'3 5'45 +/50 # 45#5+% 45#5' (5'3 5*' &:<
/#.+% %633'/5 53#/4+'/54 *#7' 4'55-'& 5*' .'#463'.'/5 6/+5
+4 %0//'%5'& 50 5*' %*+1 108'3 1-#/' 8+5* # 3'-#: #/& 5*'
3')6-#3 ! 4611-: +4 5*'/ 48+5%*'& 065 8+5* 3'-#:4 *'
1#3#.'53+% .'#463'.'/5 6/+5 5*'/ 4611-+'4 #/& .'#463'4
5*' %633'/5 (-08+/) +/50 5*' *' 108'3 1-#/' (03 5*'
+4 4'1#3#5'& (30. 5*' 5'45 (+9563' 108'3 1-#/' $: 3'-#:4
%0//'%5'& $'58''/ 5*' %*+1 #/& 5*' 5'45 (+9563' :1#44
%#1#%+5034 50 %0/530- 4611-: /0+4' #3' 1-#%'& 0/ ! 0/ 5*'
108'3 4611-: 4+&' 0( 5*' 3'-#:4 *+4 +4 +.1035#/5 $'%#64'
-'#,#)' %633'/54 +/ -#3)' '-'%530-:5+% %#1#%+5034 %#/ $' 5'/4
0( .+%30#.14 8*+%* 806-& %0.130.+4' 5*' #%%63#%: 0( 5*'
.'#463'.'/5
:1+%#- .'#463'.'/54 #3' +/ 5*' 3#/)' 0( *' %633'/5 +4 &0.+/#5'& $: 3'7'34' $+#4 -'#,#)' %633'/5 #/&
46$5*3'4*0-& -'#,#)' '#463'.'/54 #3' 5#,'/ &63+/) 8#('3
#/& 1#%,#)' 5'45 #/& (063 .'#463'.'/54 #3' .#&' 063
1#3#--'- 7'%5034 #3' 64'& 8*+%* +/+5+#-+;' 5*' 3')+45'34 %#%*'
#/& 05*'3 45#5' -0)+% 50 ;'304 03 0/'4 #/& 580 1#55'3/4
0( #-5'3/#5+/) 0/'4 #/& ;'304 50 %*'%, (03 $3+&)+/) (#6-54
*+4 1307+&'4 # )3'#5 &'#- 0( &'('%5 %07'3#)' 8*+-' +/%633+/)
.+/+.#- 5'45 07'3*'#&
13+- '8-'55<#%,#3& 063/#-
5'45+/) 8#4 7'3: '(('%5+7' #5 %#5%*+/) &'('%54 0/ 5*' '46-54 +/&+%#5' 5*#5 0( 4%#/ 5'45 (#+-63'4 #/&
0( 1#3#--'- (#+-63'4 #3' %#6)*5 $: 5'45+/) / #&&+<
5+0/ 05*'3 5:1'4 0( &'('%54 #3' %#6)*5 5*#5 .+)*5 /05 $'
%#6)*5 $: %0/7'/5+0/#- 70-5#)'<-'7'- 5'45+/) -+,' )#5' 09+&'
4*0354 #/& 40.' 5:1'4 0( $3+&)+/) (#6-54 *'4' %#/ -'#& 50
3'-+#$+-+5: 130$-'.4 07'3 5*' -+(' 0( 5*' 130&6%5 40 +5 +4 +.<
1035#/5 50 %#5%* 5*'. #5 5*' %*+1 5'45 45#)'
"' 1-#/ 50 &0 .03' &+3'%5'& 5'45+/) 0/ (6563' %*+14
64+/) 4%#/ 5'45+/) #/& 1#3#--'- 5'45+/) 50 4'5 61 #/& .'#463'
%633'/5 (03 41'%+(+% %*+1 45#5'4 +/&+%#5'& $: #650.#5+% 5'45
)'/'3#5+0/ 500-4 *+4 4*06-& +.1307' 5*' -'7'- 0( %07'3#)'
8' )'5 (03 5'454 08'7'3 0/' 130$-'. 5*#5 .#: 0%%63
+4 5*#5 0((< -'#,#)' 8+-- +/%3'#4' +/ 5*' '((035 50 +.1307'
1'3(03.#/%' +/ (6563' 130%'44'4 *+4 *#4 # &+3'%5
'(('%5 0/ 5*' #$+-+5: 0( 5'%*/+26'4 50 3'40-7' -08 %63<
3'/5 &'('%54 &&+5+0/#- 5'%*/+26'4 -+,' 108'3 4611-: 1#35+<
5+0/+/) .#: $' /'%'44#3: 50 .#,' 64#$-' 8+5* .03'
#&7#/%'& 130%'44'4
/ +/5'3'45+/) /'8 ('#563' 5*#5 +4 +.1-'.'/5'& 0/ 5*' '/#$-'4 4%#/ 3')+45'34 50 %#1563' 5*' +/5'3/#- 45#5' 0( 5*'
%*+1 8*+-' 5*' %*+1 +4 01'3#5+/) #5 41''& +/ # /03.#- 4:45'.
"' 3'('3 50 5*+4 %#1#$+-+5: #4 4#.1-'<0/<5*'<(-: 5'45+/) *'
4#.1-' +4 /0/&'4536%5+7' #/& 5*' &#5# %#/ $' #%%'44'&
8*+-' 5*' %*+1 %0/5+/6'4 50 '9'%65' %0&' $: 4%#//+/) 5*'
3'46-54 065 64+/) 5*' 0/<%*+1 <%0.1#5+$-' 5'45
#%%'44 1035 *+4 ('#563' 8#4 7'3: 64'(6- (03 &'$6))+/)
#/& %*#3#%5'3+;+/) 4:45'.<-'7'- 1'3(03.#/%' $'%#64' +5 +4
'44'/5+#--: # -0)+% #/#-:;'3 $6+-5 &+3'%5-: +/50 5*' %*+1 8*+%*
#--084 #%%'44 50 07'3 +/5'3/#- 45#5' 7#-6'4 #.1-'4 %#/
$' 5#,'/ 8+5* #/: <%0.1#5+$-' 5'45 %0/530--'3 #/&
#113013+#5' 40(58#3'
Internal Sampling. *' +/5'3/#- 4#.1-+/) %#1#$+-+5: #--084 #
4#.1-' 50 0%%63 8*'/ 5*' #3%*+5'%5'& < +/5'37#- 5+.'3
3'#%*'4 # %06/5 5*#5 .#5%*'4 # 13'4'5 7#-6' +/ # 3')+45'3 #/&
5*' %+3%6+53: +4 +/ # 41'%+(+% 45#5' / 5*' 5*'
+/5'37#- 5+.'3 0/ 5*' %*+1 +4 # <$+5 3')+45'3 5*#5 +/%3'.'/54
$: 0/' (03 '7'3: %-0%, %:%-' 5*#5 0%%634 0/ 5*' %*+1 /
#&&+5+0/#- <$+5 3')+45'3 1307+&'4 # 7#-6' 50 %0.1#3' 8+5*
5*' 7#-6' +/ 5*' +/5'37#- 5+.'3 3')+45'3 *+4 7#-6' %#/ $' 4'5
$: &0+/) # < mtctl .07' 50 %0/530- 3')+45'3† +/4536%<
5+0/ "*'/ 5*' +/5'37#- 5+.'3 7#-6' .#5%*'4 5*' 7#-6' 4'5 $:
5*' mtctl +/4536%5+0/ # %0.1#3#503 %+3%6+5 )'/'3#5'4 # 4+)/#8*+%* +4 /03.#--: 4'/5 50 5*' %0/530- -0)+% 50 %#64' #/ +/5'3<
7#- 5+.'3 +/5'33615 50 0%%63 *+4 4+)/#- +4 #-40 4'/5 50 5*'
+/ 5*+4 +.1-'.'/5#5+0/ ( 5*' %633'/5 +/4536%5+0/ +4
ISAMPLE 5*' 45#5' 0( 5*' %*+1 +4 4#.1-'& +/50 '#%* 4%#/ 3')<
+45'3 0/ 5*' (0--08+/) %*+1 45#5' $: #--08+/) '#%* 4%#/ 3')+4<
5'3 50 61&#5' &63+/) 5*' 1*#4' 8*'/ 5*' (6/%5+0/#- -#5%* +4
/05 $'+/) 61&#5'& / +/&+%#5+0/ 5*#5 # 4#.1-' *#4 0%%633'&
+4 4'/5 (30. 0/' 0( 5*' 5'45 1+/4 8*'/ 5*' 4#.1-' +4 5#,'/
*' 1+/ %#/ $' .0/+503'& $: #/ '95'3/#- <%0.<
1#5+$-' %0/530--'3 4:45'. 50 &'5'3.+/' 8*'/ &#5# %#/ $'
4*+(5'& 065 0( 5*' %*+1 *' 4*+(5+/) 0( 5*' 4#.1-'& &#5#
&0'4 /05 %033615 5*' 45#5' 0( 5*' +/5'3/#- -0)+%
† This instruction moves data to a control register. In this instance it is moving data to the
timer comparison register.
 Hewlett-Packard Company 1995
Find the failing code sequence in the system
through shmooing or functional tests.
Insert mtctl instruction into the failing code
sequence to cause interval timer to time out at a
particular clock cycle.
Arm trigger in the test circuitry through the test
access port (TAP) interface.
Run the modified code sequence, causing the
interval timer to trigger the test access port
to take a one-state snapshot of the chip logic.
Scan the sampled values out of the TAP pins
serially while the chip continues to run
uninterrupted.
Compare the snapshot taken above to values
from the simulation or from a known good snapshot taken at the same point with another chip.
Do
the results
differ?
No
Sample
subsequent
state.
Yes
Debug the failure to the failing circuit by
examining the differences between the known
good sample and the sample just taken.
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HP-UX is based on and is compatible with Novell’s UNIX operating system. It also complies
with X/Open’s* XPG4, POSIX 1003.1, 1003.2, FIPS 151-1, and SVID2 interface specifications.
UNIX is a registered trademark in the United States and other countries, licensed exclusively
through X/Open Company Limited.
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